HVAC Maintenance
By Corcoran and Harnist Heating and Air
Corcoran and Harnist Heating and Air can help keep your HVAC system running at peak performance with preventive maintenance services near Cincinnati, OH. Our skilled technicians provide thorough tune-ups and HVAC maintenance that may help extend the life of your system and ensure year-round comfort.
What Does The Process Look Like?

Book an Appointment
To start the process, book an appointment for HVAC maintenance with us by scheduling online or giving us a call.

Evaluation & Estimate
We will assess your HVAC system and recommend the appropriate maintenance services. We will provide a detailed estimate outlining the necessary tasks and costs to ensure your system runs efficiently and reliably year-round.

Perform Maintenance
A certified technician will perform thorough HVAC system maintenance to ensure optimal performance, help improve efficiency, extend the system's lifespan, and prevent future issues.
Other Services We Provide

AC Repair & Service
We offer professional AC repair and service to keep your air conditioner running efficiently and reliably. Our technicians diagnose issues, perform necessary repairs, and ensure optimal performance for your home’s comfort.

Furnace Repair & Service
We provide professional furnace repair and service to keep your heating system operating at peak performance. Our certified technicians can identify problems, perform necessary repairs, and fine-tune your system to keep you comfortable all year long.

HVAC System Installation
Let us ensure reliable comfort and energy efficiency for your home with professional HVAC system installation. We offer high-quality Carrier equipment, precise HVAC installation, and customized solutions to meet your heating and cooling needs.
Trusted HVAC Professional in Cincinnati
Great Service!!
February 02, 2026
Technicians Replaced My Furnace In No Time. Completed Within Hrs. Before Major Snowstorm On A Saturday!! Have Used Their Service Before For My Home and They Installed New HVAC System in My Mothers House As Well. No Issues After. Will Use Corcoran & Harnist Service Again If Needed.
JIM
Expertise (5)
Solve Problems (5)
Service (5)
Very good experience
December 07, 2023
Company was professional, timely and very helpful
KAREN
Expertise (5)
Service (5)
Solve Problems (5)
Pleasant experience
December 07, 2023
Corcoran and Harnist were great to work with in regards to the installation and questions that arose after the install
SCOTT
Expertise (5)
Service (5)
Solve Problems (5)
These guys are good.
September 13, 2023
top notch all around.
CHARLES
Expertise (5)
Service (5)
Solve Problems (5)
Very responsive and timely.
September 05, 2023
Very responsive. Very happy with install and follow up afterwards.
ABBY
Expertise (5)
Service (5)
Solve Problems (5)
Corcoran and Harnist Heating and Air is a great company!
August 15, 2023
I have been a customer of Corcoran and Harnist since 1999 and I couldn't be happier with them. They have always taken great care of my equipment and I trust them completely. This is the second time they replaced my heating and air conditioning equipment \- in my last home and now in my condo \- and they did a wonderful job both times. I would highly recommend them to anyone.
GAYLE
Expertise (5)
Service (5)
Solve Problems (5)
Replacement System
February 09, 2023
Excellent workmanship and courteous installers along with professional knowledge of our new system.
BOB
Expertise (5)
Service (5)
Solve Problems (5)
Excellent
November 01, 2022
They were so excellent to work with\-\-not a single person who wasn't helpful without being patronizing!
ALICE
Expertise (5)
Service (5)
Solve Problems (5)
Thrilled
August 24, 2022
Fast install date and excellent service people
JOHN
Expertise (5)
Service (5)
Solve Problems (5)
Very helpful and accomidating
July 14, 2022
They worked helping to ID the issues with the old unit, and guided us to choosing the right unit to ultimately replace the old one.
BRIAN
Expertise (5)
Service (5)
Solve Problems (5)
Always helpful!
November 30, 2021
We keep them on speed dial, and they always help!
CHARLES
Expertise (5)
Service (5)
Solve Problems (5)
Great company to deal with, great workmanship!
January 22, 2021
Great company, great technicians.
JACK
Expertise (5)
Service (5)
Solve Problems (5)
These guys don't mess around!
January 10, 2021
Fast! Just moved to the area, needed consultation on a new HVAC system, and Corcoran Harnist came out the same day I contacted them. They offered excellent solutions to my concerns and completed the installation the next day. Very happy with my new system!
BRIAN
Expertise (5)
Service (5)
Solve Problems (5)
Excellence!
November 18, 2020
Brian and the crew were beyond awesome and they're professionalism and top notch! Our salesman Ken was also top notch and very professional! Thanks for a great job and we are life long customers moving forward!
JAMES
Expertise (5)
Service (5)
Solve Problems (5)
Outstanding service response and solution!
June 23, 2020
I had no air conditioning, and Tim and his team responded immediately with outstanding service and new unit installation. They recommended the Carrier Infinity 5 stage air conditioner \- I have never heard a unit so quiet and my house has NEVER been this comfortable. I would recommend Corcoran \& Harnist and Carrier to anyone that needs a recommendation! They are the best!
Brian
Expertise (5)
Service (5)
Solve Problems (5)
Super Guy
April 08, 2020
Corcoran \& Harnist company was very knowledgeable, clean, fast and professional. I could not have expected more.
JIM
Expertise (5)
Service (5)
Solve Problems (5)
Consistant fine service
April 08, 2020
Very professional
MICHELLE
Expertise (5)
Service (5)
Solve Problems (5)
Cool deal
September 04, 2019
Great service
KERRY
Expertise (5)
Service (5)
Solve Problems (5)
Great Service!
August 30, 2019
Always a pleasure to work with Corcoran \& Harnist. Honest and Friendly!!
JAMES
Expertise (5)
Service (5)
Solve Problems (5)
A wonderful experience that removed stress and added refreshing delight to building my dream home!
August 02, 2019
Very professional, knowledgeable, prompt, and courteous. Great company, and employees. I would recommend to anyone with ANY HVAC needs or questions.
TOBIAS
Expertise (5)
Service (5)
Solve Problems (5)
comfortable inside temperature
May 17, 2019
installed in two days.
JAMES
Expertise (5)
Service (5)
Solve Problems (5)
Excellent service
May 11, 2019
I have been a customer for many years.
JANET
Expertise (5)
Service (5)
Solve Problems (5)
Installation of new HVAC system
May 10, 2019
Very professional and efficient. I was able to openly talk to the installers about how the work was going.
ROBERT
Expertise (5)
Solve Problems (5)
Perfect
April 23, 2019
Perfect job start to finish. Great work. Great price.
DAVID
Expertise (5)
Service (5)
Solve Problems (5)
To the rescue
March 14, 2019
Our furnace went on on one of the coldest days of the year. They pulled techs off other jobs to make sure we had heat. Thanks
CAROLYN
Expertise (5)
Service (5)
Solve Problems (5)
New systems
October 04, 2018
We have been using Corcoran for several years and always have good consistent service
BILL
Expertise (5)
Service (5)
Solve Problems (5)
Return customer still completely satisfied!
July 30, 2018
As a satisfied previous customer, we only looked to Corcoran \& Harnist to replace our old system!
DAVID
Expertise (5)
Service (5)
Solve Problems (5)
Great HVAC company
February 18, 2018
Our 25 yr old heat pump was dying in middle of cold weather. We called and Corcoran came out quickly.
JENNY
Expertise (5)
Service (5)
Solve Problems (5)
Honest and Professional
February 08, 2018
We recently purchased a furnace from Corcoran and Harnist. The representative who showed us the various options knew his stuff and did not try to sell us more than we needed nor wanted. The installation itself was done in a professional way, with the three installers being knowledgeable, cooperative with each other, and respectful of us. They left our house clean upon finishing the job and pointed out a scratch that they had left on the floor. The company quickly rectified the situation and we received a check to cover the repair. I would recommend them to anyone.
BARBARA
Expertise (5)
Service (5)
Solve Problems (5)
replacement humidifier installation
February 07, 2018
Excellent and dependable company in all regards for 30 years.
TOM
Expertise (5)
Service (5)
Solve Problems (5)
Great provider! Smooth installation and very courteous!
October 18, 2017
Full house replacement!
ANDY
Expertise (5)
Service (5)
Solve Problems (5)